HEADER TOXIN 19-OCT-00 1G2G TITLE MINIMAL CONFORMATION OF THE ALPHA-CONOTOXIN IMI FOR THE ALPHA7 TITLE 2 NEURONAL NICOTINIC ACETYLCHOLINE RECEPTOR RECOGNITION COMPND MOL_ID: 1; COMPND 2 MOLECULE: ALPHA-CONOTOXIN IMI; COMPND 3 CHAIN: A; COMPND 4 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 SYNTHETIC: YES; SOURCE 3 OTHER_DETAILS: THE SOLID PHASE SYNTHESIS OF ALPHA-CONOTOXIN IMI WAS SOURCE 4 CARRIED OUT USING THE F-MOC CHEMISTRY. THE SEQUENCE OF THE PROTEIN SOURCE 5 IS NATURALLY FOUND IN THE VENOM OF CONUS IMPERIALIS (IMPERIAL CONE). KEYWDS ALPHA-HELIX, 3-10 HELIX, TOXIN EXPDTA SOLUTION NMR NUMMDL 30 AUTHOR H.LAMTHANH,C.JEGOU-MATHERON,D.SERVENT,A.MENEZ,J.M.LANCELIN REVDAT 3 23-FEB-22 1G2G 1 REMARK LINK REVDAT 2 24-FEB-09 1G2G 1 VERSN REVDAT 1 08-NOV-00 1G2G 0 JRNL AUTH H.LAMTHANH,C.JEGOU-MATHERON,D.SERVENT,A.MENEZ,J.M.LANCELIN JRNL TITL MINIMAL CONFORMATION OF THE ALPHA-CONOTOXIN IMI FOR THE JRNL TITL 2 ALPHA7 NEURONAL NICOTINIC ACETYLCHOLINE RECEPTOR JRNL TITL 3 RECOGNITION: CORRELATED CD, NMR AND BINDING STUDIES. JRNL REF FEBS LETT. V. 454 293 1999 JRNL REFN ISSN 0014-5793 JRNL PMID 10431825 JRNL DOI 10.1016/S0014-5793(99)00831-5 REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH J.M.MCINTOSH,D.YOSHIKAMI,E.MAHE,D.B.NIELSEN,J.E.RIVIER, REMARK 1 AUTH 2 W.R.GRAY,B.M.OLIVERA REMARK 1 TITL A NICOTINIC ACETYLCHOLINE RECEPTOR LIGAND OF UNIQUE REMARK 1 TITL 2 SPECIFICITY, ALPHA-CONOTOXIN IMI REMARK 1 REF J.BIOL.CHEM. V. 269 16733 1994 REMARK 1 REFN ISSN 0021-9258 REMARK 1 REFERENCE 2 REMARK 1 AUTH D.SERVENT,H.LAMTHANH,S.ANTIL,D.BERTRAND,P.J.CORRINGER, REMARK 1 AUTH 2 J.P.CHANGEUX,A.MENEZ REMARK 1 TITL FUNCTIONAL DETERMINANTS BY WHICH SNAKE AND CONE SNAIL TOXINS REMARK 1 TITL 2 BLOCK THE ALPHA 7 NEURONAL NICOTINIC ACETYLCHOLINE RECEPTORS REMARK 1 REF J.PHYSIOL.(PARIS) V. 92 107 1998 REMARK 1 REFN ISSN 0021-7948 REMARK 1 DOI 10.1016/S0928-4257(98)80146-0 REMARK 1 REFERENCE 3 REMARK 1 AUTH P.A.QUIRAM,S.M.SINE REMARK 1 TITL IDENTIFICATION OF RESIDUES IN THE NEURONAL ALPHA7 REMARK 1 TITL 2 ACETYLCHOLINE RECEPTOR THAT CONFER SELECTIVITY FOR CONOTOXIN REMARK 1 TITL 3 IMI REMARK 1 REF J.BIOL.CHEM. V. 273 11001 1998 REMARK 1 REFN ISSN 0021-9258 REMARK 1 DOI 10.1074/JBC.273.18.11001 REMARK 1 REFERENCE 4 REMARK 1 AUTH I.V.MASLENNIKOV,Z.O.SHENKAREV,M.N.ZHMAK,V.T.IVANOV, REMARK 1 AUTH 2 C.METHFESSEL,V.I.TSETLIN,A.S.ARSENIEV REMARK 1 TITL NMR SPATIAL STRUCTURE OF ALPHA-CONOTOXIN IMI REVEALS A REMARK 1 TITL 2 COMMON SCAFFOLD IN SNAIL AND SNAKE TOXINS RECOGNIZING REMARK 1 TITL 3 NEURONAL NICOTINIC ACETYLCHOLINE RECEPTORS REMARK 1 REF FEBS LETT. V. 444 275 1999 REMARK 1 REFN ISSN 0014-5793 REMARK 1 DOI 10.1016/S0014-5793(99)00069-1 REMARK 1 REFERENCE 5 REMARK 1 AUTH J.P.ROGERS,P.LUGINBUHL,G.S.SHEN,R.T.MCCABE,R.C.STEVENS, REMARK 1 AUTH 2 D.E.WEMMER REMARK 1 TITL NMR SOLUTION STRUCTURE OF ALPHA-CONOTOXIN IMI AND COMPARISON REMARK 1 TITL 2 TO OTHER CONOTOXINS SPECIFIC FOR NEURONAL NICOTINIC REMARK 1 TITL 3 ACETYLCHOLINE RECEPTORS REMARK 1 REF BIOCHEMISTRY V. 38 3874 1999 REMARK 1 REFN ISSN 0006-2960 REMARK 1 DOI 10.1021/BI9826254 REMARK 2 REMARK 2 RESOLUTION. NOT APPLICABLE. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : XWINNMR 2.5, X-PLOR 3.851 REMARK 3 AUTHORS : BRUKER (XWINNMR), BRUNGER (X-PLOR) REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL REMARK 4 REMARK 4 1G2G COMPLIES WITH FORMAT V. 3.15, 01-DEC-08 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 20-OCT-00. REMARK 100 THE DEPOSITION ID IS D_1000012150. REMARK 210 REMARK 210 EXPERIMENTAL DETAILS REMARK 210 EXPERIMENT TYPE : NMR REMARK 210 TEMPERATURE (KELVIN) : 278 REMARK 210 PH : 5.8 REMARK 210 IONIC STRENGTH : 0.1 REMARK 210 PRESSURE : AMBIENT REMARK 210 SAMPLE CONTENTS : 5-6 MM ALPHA-IMI; 90 % H2O, 10 % REMARK 210 D2O; 0.1 M POTASSIUM PHOSPHATE REMARK 210 BUFFER PH 5.8 REMARK 210 REMARK 210 NMR EXPERIMENTS CONDUCTED : NOESY; DQF-COSY REMARK 210 SPECTROMETER FIELD STRENGTH : 500 MHZ REMARK 210 SPECTROMETER MODEL : DRX REMARK 210 SPECTROMETER MANUFACTURER : BRUKER REMARK 210 REMARK 210 STRUCTURE DETERMINATION. REMARK 210 SOFTWARE USED : GIFA 4.22 REMARK 210 METHOD USED : THE STRUCTURES WERE GENERATED REMARK 210 USING THE FORCE FIELDS REMARK 210 PARALLHDG.PRO AND CHARMM22 OF X- REMARK 210 PLOR. REMARK 210 REMARK 210 CONFORMERS, NUMBER CALCULATED : 60 REMARK 210 CONFORMERS, NUMBER SUBMITTED : 30 REMARK 210 CONFORMERS, SELECTION CRITERIA : STRUCTURES WITH THE LEAST REMARK 210 RESTRAINT VIOLATIONS,STRUCTURES REMARK 210 WITH THE LOWEST ENERGY REMARK 210 REMARK 210 BEST REPRESENTATIVE CONFORMER IN THIS ENSEMBLE : 7 REMARK 210 REMARK 210 REMARK: THIS STRUCTURE WAS DETERMINED USING STANDARD 2D REMARK 210 HOMONUCLEAR TECHNIQUES. REMARK 215 REMARK 215 NMR STUDY REMARK 215 THE COORDINATES IN THIS ENTRY WERE GENERATED FROM SOLUTION REMARK 215 NMR DATA. PROTEIN DATA BANK CONVENTIONS REQUIRE THAT REMARK 215 CRYST1 AND SCALE RECORDS BE INCLUDED, BUT THE VALUES ON REMARK 215 THESE RECORDS ARE MEANINGLESS. REMARK 300 REMARK 300 BIOMOLECULE: 1 REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON REMARK 300 BURIED SURFACE AREA. REMARK 350 REMARK 350 COORDINATES FOR A COMPLETE MULTIMER REPRESENTING THE KNOWN REMARK 350 BIOLOGICALLY SIGNIFICANT OLIGOMERIZATION STATE OF THE REMARK 350 MOLECULE CAN BE GENERATED BY APPLYING BIOMT TRANSFORMATIONS REMARK 350 GIVEN BELOW. BOTH NON-CRYSTALLOGRAPHIC AND REMARK 350 CRYSTALLOGRAPHIC OPERATIONS ARE GIVEN. REMARK 350 REMARK 350 BIOMOLECULE: 1 REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: MONOMERIC REMARK 350 APPLY THE FOLLOWING TO CHAINS: A REMARK 350 BIOMT1 1 1.000000 0.000000 0.000000 0.00000 REMARK 350 BIOMT2 1 0.000000 1.000000 0.000000 0.00000 REMARK 350 BIOMT3 1 0.000000 0.000000 1.000000 0.00000 REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: CLOSE CONTACTS REMARK 500 REMARK 500 THE FOLLOWING ATOMS ARE IN CLOSE CONTACT. REMARK 500 REMARK 500 ATM1 RES C SSEQI ATM2 RES C SSEQI DISTANCE REMARK 500 REMARK 500 REMARK: NULL REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: TORSION ANGLES REMARK 500 REMARK 500 TORSION ANGLES OUTSIDE THE EXPECTED RAMACHANDRAN REGIONS: REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER; REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE). REMARK 500 REMARK 500 STANDARD TABLE: REMARK 500 FORMAT:(10X,I3,1X,A3,1X,A1,I4,A1,4X,F7.2,3X,F7.2) REMARK 500 REMARK 500 EXPECTED VALUES: GJ KLEYWEGT AND TA JONES (1996). PHI/PSI- REMARK 500 CHOLOGY: RAMACHANDRAN REVISITED. STRUCTURE 4, 1395 - 1400 REMARK 500 REMARK 500 M RES CSSEQI PSI PHI REMARK 500 5 CYS A 2 -70.51 -84.70 REMARK 500 12 CYS A 2 -62.40 -90.72 REMARK 500 18 CYS A 3 24.90 -78.29 REMARK 500 22 CYS A 3 3.20 -67.58 REMARK 500 23 CYS A 3 2.58 -69.56 REMARK 500 27 ALA A 9 8.68 -68.32 REMARK 500 30 CYS A 2 -76.28 -87.74 REMARK 500 REMARK 500 REMARK: NULL REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE NH2 A 13 DBREF 1G2G A 1 12 UNP P50983 CXA1_CONIM 1 12 SEQRES 1 A 13 GLY CYS CYS SER ASP PRO ARG CYS ALA TRP ARG CYS NH2 HET NH2 A 13 3 HETNAM NH2 AMINO GROUP FORMUL 1 NH2 H2 N HELIX 1 1 ASP A 5 TRP A 10 1 6 SSBOND 1 CYS A 2 CYS A 8 1555 1555 2.04 SSBOND 2 CYS A 3 CYS A 12 1555 1555 2.03 LINK C CYS A 12 N NH2 A 13 1555 1555 1.36 SITE 1 AC1 2 ALA A 9 CYS A 12 CRYST1 1.000 1.000 1.000 90.00 90.00 90.00 P 1 1 ORIGX1 1.000000 0.000000 0.000000 0.00000 ORIGX2 0.000000 1.000000 0.000000 0.00000 ORIGX3 0.000000 0.000000 1.000000 0.00000 SCALE1 1.000000 0.000000 0.000000 0.00000 SCALE2 0.000000 1.000000 0.000000 0.00000 SCALE3 0.000000 0.000000 1.000000 0.00000 MODEL 1